其主要症状为干咳少痰、口渴心烦、舌边光红、苔少而干。
Its main symptoms are cough less sputum, thirsty upset, tongue-edge red, moss and less dry.
广义相对论预言这种光的波长会因这些星系的质量而有少量的偏移，这种效应称为引力红移。
General relativity predicts that the wavelength of this light will be shifted by a small amount due to the galaxies' mass, in an effect called gravitational redshift.
这使得恒星的外层急剧膨胀，并因冷却而发出红色的光，而成为了一颗红巨星。
This causes the star's outer layers to expand enormously and to cool and glow red as they do so, rendering the star a red giant.
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